Got a question about tool post grinders! I'm grinding a piece of 3" diameter thick wall steel tubing between centers in my lathe. Should the workpiece be turning the same direction as the grinding wheel, or opposite its rotation? Surface finish isn't as big a consideration as the need to maintain a more accurate diameter than I can get with a carbide tool bit- - - -I'm looking for +/- .0005 or so.
Thanks! Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Jerry, According to this, they should both be turning the same direction, so that the grinding wheel is moving opposite the workpiece direction at the contact point.
Kevin Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com] #2 - '29 Ford pickup restored from the ground up. First car '29 Ford Special Coupe Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
I agree with both Kevin and Don. If they weren’t running in the same direction (both clockwise or counter clockwise) the speed of the wheel would be effectively be reduced.
Phil Moderator, The Engine Shop, Interiors and Project Journals
